Portion of a shoe sole



FIG. 1 is a right side perspective view of a portion of a shoe sole showing our new design;

FIG. 2 is a left side perspective view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The uneven broken line showing of the remainder of the shoe is for illustrative purposes only and forms no part of the claimed design. The unshaded areas form no part of the claimed design. 

The ornamental design for a portion of a shoe sole, as shown and described. 